fixed signature bug and delete unused const
fixed signature bug and delete unused const

dcarbone/cloudstack-php-client,jasonhancock/cloudstack-php-client,myENA/cloudstack-php-client,jasonhancock/cloudstack-php-client,qpleple/cloudstack-php-client,dcarbone/cloudstack-php-client,phansys/cloudstack-php-client,phansys/cloudstack-php-client,myENA/cloudstack-php-client